On a warm, sunny day, they were thinking about stormy weather at Minot Air Force Base.
The base held an exercise to test its ability to respond to a tornado strike on a missile site.
The scenario said that a payload hauler - the big semi truck you see there - had been hit and turned over by tornado winds.
The result was a response by many departments at the base, coordinating with emergency responders from the local area who would normally react to such a weather incident.
Lieutenant Jose Davis says today's exercise focused on the ability to respond to an emergency far from the base itself.
(Lt. Jose Davis, Minot Air Force Base) "For this exercise, this is something that would happen in the missile complex and the scenario is this is at Juliet 1 which is near the town of Carpio. So it's around a 45 minute to one hour drive for our folks to get out there to assess the situation. As you can imagine, you would have multiple agencies go out there from the base and it takes a long time."
Lieutenant Davis says the FBI and Department of Energy as well as the Defense Department and local emergency responders must all coordinate their response to damage to base equipment caused by a weather event.
He says the exercise continues through Thursday with office-based reviews of procedures.